Concrete form



Oct. 12,1926. 1,602,575

F. H. FRANSON CONCRETE FORM Filed Feb. 27, 1926 2 Sheets-Sheet 1 ATT RNEYV CONCRETE FORM Filed Feb. 27, 1926 2 Sheets-Shaev 2 IN VEN TOR. fkrz fif/ia @4060 r ATORNY.

Patented Oct. 12, 1926.

UNITED STATE FRITZ HUGO FRANSQN, 01 DENVER, COLORADO. i.

CONCRETE FORM.

Application filed February 2 This invention relates to a form for easting concrete walls, and has for its principal object the provision of a form which can be quickly erected, will be rigid in construction, and which can be repeatedly used without damage.

Another object of the invention is to provide a form which can be readily removed from the finished wall and replaced to cast a an additional section.

Still another object is to construct the various units so that they will occupy a minimum of space and can be readily transported. 1

A further object is to provide a core for the form whereby hollow walls may be cast, the core being extendibleso that the hollow portion of the wall may be of any desired length.

A still further object is to so construct the form that it will be elastic in use, that is, it may be extended or constricted to accommodate any desired length of wall.

Other objects and advantages reside in the detail construction of the invention, which is designed for simplicity, economy, and efficiency. These will become more apparent from the followingdescription.

In the following detailed description of the invention reference is had to the accompanying drawing which forms a part hereof. Like numerals refer to like parts in all views of the drawing and throughout the description.

In the drawing: 7

Fig. 1 is a perspective view of a portion of the form in the erected position, ready to receive the concrete. 1

Fig.2 is a detail view of. one of the bars forming the longitudinal members of the form.

Fig. 3 is a vertical cross section through the form of Fig. 1. I 1 Fig. 4 is adetail view of one of the form plates employed in the invention.

Fig. 5 is a horizontal section through one 7 of the wall forms.

Fig. 6 is a detail view of an alternate method of placing the longitudinal members.

Fig. 7 is a plan view of the form with the improved core in place.

Fig. 8 is a vertical section taken on the line 88, Fig. 7, with the core partly broken away to show its interior.

The invention comprises a series of form plates 10, illustrated in detail in Fig. 4.

7, 1926. Serial No. 91,055.

Each of the plates 10 carries along one of its longitudinal edges a connecting angle 11. The angle 11 projects beyond the edge of the plate 10 ;so as to overlap the joint between adjacent plates and prevent the concrete from flowing therethrough. Its angle shape serves to stiffen the form at the joints between the-plates 10. V Y

The plates 10 are maintained in adjacent relation by means of longitudinal members,

each of which comprise an inside angle 12,

and anoutside angle 13. The outside angle 13 is illustrated in detail .in Fig. 2 and carries a series of spaced pins 14 in one of its legs and a series of spaced openings 15 in the other of its, legs. The, pins 14 are intended to pass through plate openings 16, formed adjacent the top and bottom edges of each of the form plates 10, and through spaced openings formed in one leg of the inner angle 12. This construction locks the form plates in place between the inner and outer angles 12 and 13 when in place in the form.

The two walls of the form are similarly constructed,'each comprising a series of form plates 10 clamped .at their tops and bottoms in the longitudinal members, between the inner and outer angles 12 and 13. Thetwo walls are maintained'in spaced relation by means of hooked spacers 17, the downward turned extremities of which pass through spaced openings in the inner angle 12 and through the openings 15 in the outer angle 13. These spacers 17 are above the top of the concrete so that they do not become imbedded in the walls.

To prevent expansion of the walls, ties 18 are provided. These ties are of the shape illustrated in Fig. 3, having looped extremities which pass through slotted openings 19 in the form plates 10 and are locked therein by means of suitable nails 20. The ties 18 remain in the wall after the concrete has set. In place of the ties 18 a single piece of wire might be employed, and passed through the slots 19. The loops of the ties 18 will project beyond'the face of the finished wall and act as keys to secure plaster or stucco to the wall surfaces. Should they project too far,

they can be easily bent over against the wall surface.

The extremities of the inner and outer angles 12 and 13are beveled at so that at the corners of the building they may be brought into close contact, as illustrated in Fig. 1, and tied together by means of relatively long spacer bars 21, which will extend across the corners. For turning corners a special corner form plate, 29, is provided, which consists of two of the plates 10 bent at an angle to each other.

After the wall is cast, the spacer bars 17 and 21 and the nails 20 are removed. This releases the outer angles 13 and the form plates 10 so that they may be readily removed from the wall. The inner angle 12 can then be readily removed from the wall, since it is imbedded only its thickness. In some installations, it might be desired to leave the inner angle 12 in the wall as a plate for the support of the floor joists, girders, trusses, etc. In these cases, the hori- Zontal leg of the inner angle 12 is turned inwardly as illustrated in Fig. 6 so as to form a corner bead along the wall edge.

Should it be desired to cast a wall with hollow openings in its interior, the core form, illustrated in Figs. 7 and 8 is employed. This form fits between the walls previously described and is held spaced therefrom by any desired means. I prefer to employ for this, sections of metal lath 22, cut so as to fit snugly between the walls of the form and partially around the core form, as illustrated in Fi 7.

The core form comprises two or more plates 23, having their edges turned inwardly, as indicated at 24, and two semi-circular end plates with similarly turned edges 24-. hen the plates 23 are placed adjacent each other or adjacent the end plates 25, the inwardly turned edges of the adjacent plates will project outwardly from each other so as to readily engage into a locking member 26. The locking members 26 are of a length substantially equal to the length of the plates 23 and 25 and are separated the de sired width by means of spacer plates 27 to which they are secured.

The form can be extended by inserting additional plates 23 and additional spacer plates 27 with their locking means 26. The plates 23, 25 and 27 are all provided with hooks 28 adjacent their upper edge to facilitate their ready removal from the wall. In removing the core form, the spacer plates 27 are first withdrawn. This removes the locking members 26 from engagement with the inwardly turned edges 24 and allows all of the plates to be readily withdrawn from the wall surface.

lVhile a specific form of the improvement has been described and illustrated herein, it is desired to be understood that the same may be varied, within the scope of the appended claims, without departing from the spirit of the invention.

Having thus described the invention, What I claim and desire secured by Letters Patent is l. A form for concrete comprising, a series of form plates arranged to be secured together at their upper and lower extremi ties by means of longitudinal members, said longitudinal members comprising angle bars; and pins projecting horizontally from the vertical leg of said angle bars and adapted to engage in openings in said form plates.

2. A form for concrete comprising, a series of form plates arranged to be secured together at their upper and lower extremities by means of longitudinal members, said longitudinal members comprising a pair of angle bars and pins in one of said angle bars adapted to pass through openings in said form plates and the other of said angle bars.

3. A form for concrete comprising, a series of form plates arranged to be secured together at their upper and lower extremities by means of longitudinal members, said longitudinal members comprising a pair of angle bars; pins in one of said angle bars adapted to pass through openings in said form plates and the other of said angle bars; and spacers having downwardly turned extremities adapted to pass through openings in both of said angle bars.

t. A core for casting hollow concrete walls comprising a series of plates having inwardly turned edges, and a tie member arranged to engage the inwardly turned edges of adjacent plates, said tie member comprising a spacer plate and channel members carried along the edges of said spacer plate so as to engage said inwardly turned edges.

5. Means for detachably securing a series of form plates adjacent each other in a form for concrete walls comprising an outer angle bar arranged for placing along the exterior face of adjacent plates; and an inner angle bar arranged for placing along the inner face of adjacent plates; and pins carried by said outer angle bar and adapted to pass through openings in said plates and said inner angle bar.

6. A form for concrete walls comprising a series of form plates arranged at opposite sides of said wall; longitudinal members extending along said form plates at each side of said wall, said longitudinal members comprising a pair of angle bars, the horizontal leg of said angle extending over said plates, the vertical leg of said angle extending along the inner face of said plates between the form plates at the opposite faces of said wall; and means for securing the vertical leg of said longitudinal members to said form plates.

In testimony whereof, I afiix my signature.

FRITZ HUGO FRANSON. 

